Fuse device.



E: 0. SCHWEITZER.

FUSE DEVICE- APPLiCATlON FILED NOV. 3. 1913.

Patented Sept. 18, 1917,

il llhllf z Wuhan I m UNITED STATES PATENT OFFICE.

EDMUND 0. SCHWEITZER, OF CHICAGO, ILLINOIS, ASSIGNOR TO SCHWEITZER &CONRAD, OF- CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FUSE DEVICE.

Specification of Letters Patent.

Application filed November 3, 1913. Serial No. 798,858.

To all whom it may concern:

Be-it known that I, EDMUND O. SOHWEIT- znn, a citizen of the UnitedStates, residing at Chicago, in the county of Cook and State ofIllinois, have invented a certaln new and useful Improvement in FuseDevices, of which the following is a full, clear, concise, and exactdescription, reference being had to the accompanying drawings, forming apart of this specification.

My invention relates to fuse devices, and especially fuse devices forextra high potential work.

Prominent objects of the invention are to provide a simple and practicaldevice of the class mentioned; to arrange for the taking care of largecurrents in such devices; to avoid arcing and explosions and otherobjectionable results upon the operation of the device; to secureaccuracy and efficiency; and to secure other desirable results in asimple and practical manner.

In the accompanying drawings Figure 1 is a view largely in longitudinalor vertical section of a fuse device embodying my pressent invention;

Fig. 2 is a view of a top of said device shown in longitudinal sectionon an en'- larged scale;

Fig. 3 is a Fig. 2;

Fig. 4 is a view similar to Fig. 2, of a modification v Fig. 5 is a planof the device shown in Fig. 4.

The device shown in the drawings comprises a tube 1 which may be ofglass or other insulating material as desired. This is preferablycylindrical and of sufficient length to give good results as hereinafterpointed out. A metal ferrule or collar 2, made of brass or copper orother suitable material, encircles the top portion of the tube 1,fitting closely to the same. A fuse 3 in the form of a washer is mountedupon the top of the tube 1 and ferrule 2 and arranged to make electricalcontact with the latter, as for example by soldering said washer fuse 3to said ferrule 2. A cone shaped member or terminal 4 is arranged planof the device shown in in connection with the fuse 3, said cone 4beingconveniently provided with a laterally projecting lip or edgeportion 5 which fits against the washer fuse 3, the body portion of saidcone 4 thence extending into the interior of the tube 1. Said cone 4 isin the arrangement referred to shown in Figs. 1 and 3, preferably madeof metal and makes electrical connection with the fuse 3, beingpreferably soldered thereto. A spring 6 is arranged within the tube 1and extended lengthwise substantially from end to end of the same. Theupper end of said spring 6 is extended to the terminal or member 4, soas to make good mechanical and electrical connection therewith, a simpleway being to extend the end portion 7 of said spring up through thebottom of the member 4 and bead or head the end of said end 7, as shownin Fig. 2. A cap 8 preferably of brass or copper or other suitable metalis fitted to the lower end of the tube 1, and engages the lower end ofspring 6. The arrangement is such that the spring 6 is-extended andsubjected to tension when extended the full length of the tube 1, andconnected at its ends as described. A suitable dielectric or areextinguishing liquid, such as carbon tetra-chlorid 9, is arranged withinthe tube 1 and substantially-fills the same. The cap 8 is convenientlyprovided with a screw plug 10 by which said liquid can be introducedinto, and if necessary, withdrawn from the tube 1. Connection with acircuit in which the device is to be included is made by means of theferrule 2 and cap 8 in any suitableor desired manner.

From the foregoing it will be seen that the circuit is made through thespring 6, member 4, and fuse 3. When an overload current traverses thecircuit the fuse 3 will be blown, thereby releasing the member 4,whereupon the spring 6 draws said mem ber downward, assisted by gravity,so that the circuit is broken and a wide opening or separation is madebetween said member 4 and the ferrule 2. The result is that an arc isprevented or extinguished, the liquid within the tube being forcedupward along the edges of the member 4 as the same isdrawn quicklydownward by the spring 6. Also damaging results from explosion areprevented, the break in the circuit occuring at the end of the tube 1,and at or within the space inclosed by the metal ferrule 2. Beside thisit will be seen that the device is very simple, the fuse 3 and terminal4 serving as end pieces or closures, and also as vents for the tube 1,and the tube being automatically opened for the introduction of a newfuse when the device operates. The number of parts entering into theconstruction is very small.

In the modification shown in Figs. 4 and 5 the member 4 is preferablymade of insulating material instead of metal as in the other device. Insuch case conductors 11,

11, extend from the spring end 7 to the fuse 3 so as to make connectionbetween the fuse and spring. The fuse 3 fits against the end of the tube1 and also within the end of the metal ferrule 7 A cap or cover 12 ispreferably mounted upon the top of the member 4, being convenientlysecured upon an upward projection 14 thereon. A washer or collar 15 isfitted upon said member below the portion 14;, so that in this way thefuse 3 is held securely in position. The operation of this device is insubstance the same as that of the preceding device. The rating of thefuse may be varied by changing the size of the washer 14.

It will be understood that changes and modifications can be made withoutdeparting from the spirit of the invention.

What I claim is:

1. A fuse device comprising a tubular casing, a member forming a cap andclosing the end of the tubular'casing, said cap including a ferrule, afusible element mounted upon the end of the ferrule, a terminal held bythe fusible element, and means tending to separate the terminal from thecap.

2. A fuse device having an insulated tubular member, a metallic membersurrounding the tubular member at each end, a fusible member extendingacross the end of one of the metallic members, a movable membersupported by the fusible member and forming a closure for the endadjacent the movable member, and a conductor extending between themetallic members surrounding the tubular members, said conductor tendingto separate the movable member from the fusible member.

3. A fuse device comprising an insulated tubular member, a metallicmember surrounding the end of the insulated member, a ring-shaped fusehaving one edge connected with the metallic member, a movable membersupported by and extending into the aperture of the ring shaped fuse,said members and the ring shaped fuse forming a closure for the end ofthe tube and means tending to separate the movable member from saidfuse.

4. A fuse device comprising a ring shaped fuse, a contact member forengaging the outer edge portion of said fuse, and a terminal deviceengaging the inner edge portion of said fuse and extending into theaperture of the ring, and means for exerting tension upon said terminaldevice said means being secured to the end of the terminal which extendsinto the aperture in said ring.

5. A fuse device comprising an insulated tube, a ring shaped fuse at theend of the tube, and a terminal member entering said ring and engagingsaid fuse, in combination with spring means within the tubular deviceacting upon said terminal member.

6. A fuse device comprising an insulated tube, a ring shaped fuse devicefitted to the end of said tube, a terminal member located within theopening of said fuse and having a portion which is larger than saidopening, said fuse and terminal member forming a closure for the end ofthe tube and a member exerting tension upon said terminal member.

7. A fuse device comprising a tube, a ring shaped fuse device fitted tothe end of said tube, a terminal member located within the opening ofsaid fuse, said fuse and terminal member forming a closure for the endof the tube, and means within the tube for exerting tension upon saidterminal member.

8. A fuse device comprising a tube, a metallic member at the end of saidtube, a ring shaped fuse device fitted to the end of said tube andmaking contact with said metallic member, a terminal member arrangedwithin the fuse and forming therewith a closure for the tube, and springmeans with in the tube engaging and drawing upon said terminal member.

9. A fuse device comprising a tube, a me tallic member at the end ofsaid tube, a ring shaped fuse device fitted to the end of said tube andmaking contact with said metallic member, a terminal member arrangedwithin the fuse and forming therewith a closure for the tube, and springmeans within the tube engaging and drawing upon said terminal member,said terminal member being in the form of a cone with its smaller endwithin the tube.

10. A fuse device comprising a tube of insulating material, a metalferrule surrounding an end portion of said tube, a flat washer-like fusedevice fitted against the end of said tube and contacting with saidferrule, a metal cone-shaped member arranged within the opening of saidfuse and having its small end pointing inward, the outer end of saidmember engaging said fuse and the fuse and member forming a. closure forthe tube, and a spring arranged within the tube grid engaging anddrawing upon said mem- 11. A fuse device comprising a tube of insulatingmaterial, a metal ferrule surrounding an end portion of said tube, afiat washer-like fuse fitted against the end of said tube and contactingwith said ferrule, a metal cone-shaped member arranged within theopening of said fuse and having its small end pointing inward, the outerend of said cone engaging said fuse and the fuse and member forming aclosure for the tube, and a spring arranged within the tube and engagingand drawing upon said member, anl an insulating liquid located withinthe tu e.

12. A fuse device comprising a tube of insulating material, a metalferrule surrounding an end portion of said tube, a flat washer-like fusefitted against the end of said tube and contacting with said ferrule, ametal cone-shaped member arranged within the opening of said fuse andhaving, its small end pointing inward, the outer end of said memberengaging said fuse and the fuse and member forming a closure for thetube, a spring arranged within the tube and engaging and drawing uponsaid member, an insulating liquid located within the tube, and ametallic cap fitted to the other end of the tube and engaging the otherend of said spring.

13. In a fuse device comprising a tubular casing, a terminal provided insaid casing and supported by an apertured fusible element, said terminalengaging the inner edges of the aperture, a spring conductor secured tothe terminal and extending into the easing, and tending to separate theterminal and the fusible element.

14. A fuse device comprising a tubular casing, metallic cap membersprovided upon opposite ends of said casing, said members forming contactmembers and closures for the ends of said tube, one of the cap membersbeing composed of an apertured fusible member having its inner and outeredges in contact with said contact member, and a movable terminal memberrespectively, said terminal member having an end which projects throughthe aperture in said fusible member, and a spring conductor connectingthe cap members provided upon the ends of said casing through saidterminal.

15. A fuse device comprising a tubular casing, a cap member at one endof said casing, said cap member having an aperture axial with thecasing, a cone-shaped member located at said end of said casing andarranged within said aperture, a fuse located at said aperture and withsaid cone shaped member closing the same, said fuse being engaged bysaid member, are extinguishing liquid within said casing, and springmeans for drawing said cone-shaped member inwardly and ejecting theliquid out through the opening in said cap member.

' In Witness whereof, I hereunto subscribe my name this 30th day ofOctober, A. D., 1913.

EDMUND O. SCHWEITZER.

Witnesses:

A. LYDA Jorms, HAZEL ANN JONES.

